Backend for css rule tracking

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index 502a1da736bf9e3247eb4e30da4819b1f34e16f0..532d41a7112cf1ad92eaa30b98250e1850ac1953 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -2765,6 +2765,17 @@
                 "description": "CSS rule representation."
             },
             {
+                "id": "RuleUsage",
+                "type": "object",
+                "properties": [
+                    { "name": "styleSheetId", "$ref": "StyleSheetId", "description": "The css style sheet identifier (absent for user agent stylesheet and user-specified stylesheet rules) this rule came from." },
+                    { "name": "range", "$ref": "SourceRange", "description": "Style declaration range in the enclosing stylesheet (if available)." },
+                    { "name": "ruleType", "type": "string", "optional": true, "enum": ["Style", "Charset", "Import", "Media", "FontFace", "Page", "Keyframes", "Keyframe", "Namespace", "Supports", "Viewport"] },

[pfeldman, 2016/10/31 21:03:36]

Can we expose it when we need it?

+                    { "name": "used", "type": "boolean", "description": "Indicates whether the rule was actually used by some element in the page." }
+                ],
+                "description": "CSS rule usage information."
+            },
+            {
                 "id": "SourceRange",
                 "type": "object",
                 "properties": [
@@ -3134,6 +3145,20 @@
                 ],
                 "description": "For the main document and any content documents, return the LayoutTreeNodes and a whitelisted subset of the computed style.",
                 "experimental": true
+	    },
+            {
+                "name": "setSelectorRecording",
+                "parameters": [
+                    { "name": "enable", "type": "boolean" }
+                ],
+                "description": "Enables the selector recording."
+            },
+            {
+                "name": "getRuleList",
+                "returns": [
+                    { "name": "CSSRules", "type": "array", "items": { "$ref": "RuleUsage" } }
+                ],
+                "description": "The list of rules with an indication of whether these were used"
             }
         ],
         "events": [